I’ve owned the Surface from new and I have tried to keep it in good condition.
There are some scratches to the side of the unit where:
1) The power supply was attached/reattached
2) The Surface pen was kept and scratched the side
Other than that, there are no really noticeable marks on the unit.
I’ve had a screen protector (glass) on the Surface from purchase and kept…
Used Microsoft Surface Pro 4 i7, 16GB Ram, 512GB